Fresh air terminal unit with counterflow opposing flow static heat recovery.

Construction features

• Recovery unit: very high yield static type with aluminium plates with counterflow with close step. Side extraction of exchange pack (except for size 40 which is extracted from the bottom).
• Fans: fresh air inlet and forward blade double intake centrifugal expulsion type with a continuously adjustable directly coupled electric motor; optionally, EC Brushless technology high efficiency electric motors. Fan unit installed on anti-vibration mountings to prevent the transmission of vibration to the structure. The EC fans can be factory set for operation with constant flow (specification to be provided in order)
• Structure: frame made with extruded aluminium profile with preloaded nylon joints. Sandwich buffer panels, 23 mm thick, made with galvanised sheet steel on the inside and pre-painted on the outside with thermal and acoustic insulation made of injected polyurethane, with a density of 45 kg/m3.
• Filtering section: filtration sections made of compact cell filters with low pressure drop polypropylene media, removable from the side, with F7 efficiency class in fresh flow and M5 in expulsion flow.
• Factory-installed dirty filter differential pressure switches
• Condensate drain pan made of galvanised sheet steel with condensate drain connection from the bottom.
• Integrated free cooling or thawing by-pass system. Thanks to the presence of a motorised damper next to the heat recovery, a bypass system can be created to manage freecooling or thawing depending on thermohygrometric needs or conventions

Versions

• UTNR-A/O PLATINUM - Recovery unit with opposing flow heat exchanger, installed horizontally and with standard multi-speed fans
• UTNRE-A/O PLATINUM - Recovery unit with opposing flow heat exchanger, installed horizontally and with Brushless EC fans that reduce power consumption for ventilation at equal performance.

Available orientation
• 01 - Right-hand connections
• 02 - Left-hand connections
The selected orientation must be specified to process the job order.

Installation
• EXT- Outdoor installation including rain cover, 80 mm-high base and an outdoor electrical box

Factory fitted accessories

• BER - Reheating electrical resistance installed inside, complete with filament-type safety thermostats and control relays to contain pressure drops.
230/1/50 single-phase electrical supply for model 040. 400/3/50 three-phase for models 075÷500.
• BA - Internal hot water reheating coil.
• BAATG - Antifreeze thermostat installed downstream of the water reheating coil.
• BP - Bypass control for free-cooling (suitable for PCU and KPCUE) including damper actuator and 2 NTC probes on board the machine.
• ERF7-F7 efficiency return filter

Separately supplied accessories

• KSBFR - Section containing hot/cold water coil to reheat or recool, placed outside the machine in front of the inlet. Includes stainless steel condensate drain pan with drain connection from the bottom.
• KSBFR + ATG - Hot/cold water coil section with mounted antifreeze thermostat.
• KSRE - Regulation damper set up for servo-control, consisting of a galvanised sheet steel frame with adjustable fins.
• KSSC - Duct silencer with a rectangular base made of glass wool covered with a protective film of glass fibre and micro-stretched sheet steel.
• KRMS - Section with 3 dampers for air mixing and recirculating (only for horizontal installation).
• KSPC - Panel with round fittings.

Controls

• KCV2 - Speed selector for wall mounting installation, to select from 3 speeds: Off/heating/cooling switch; 3-speed switch; 230V power supply.
• PCU-KPCUE - Control panel for wall mounting installation, allows the winter/summer room temperature to be controlled, gives consent to activate or exclude the water coil or the electrical resistance. Selects the operating speed of the fan from minimum, medium, maximum (excluding model 40 which only offers one speed) or by 0/10 V regulation (KPCUE for EC fans) and controls the free-cooling function.
• KPTZ - Rotating potentiometer for wall mounting installation, dedicated to manual fan speed control. The speed of delivery and return fans is calibrated with a single potentiometer (only for the EC Brushless fan version).

Full Controls
• KRFCS - Electrical panel complete with: DDC programmable microprocessor regulator. BMS interfacing Integrated as standard with Modbus RTU protocol, main disconnecting switch, relay to control various users, terminal blocks for quick connection of all machine components, auxiliary circuit supply with suitable transformer 230/12-24V.

USER PANELS (for KRFCS)
• KHMIG -Interface terminal with black monochrome graphic display with LED backlighting.
• KHMIR - Interface terminal complete with integrated room temperature probe with black monochrome graphic display with LED backlighting.
• KTOUCH - Black and white touch screen control panel.
• KCOLOR - Colour touch screen control panel.
• KCW - White decorative plate for control panel.
• KCB - Black decorative plate for control panel.
• KWMS - Wall mounting installation support for control panel.


Valves and actuators
• KV3V - PN40 Mixer/diverter 3-way regulation ball valves, female threaded hydraulic connections.
• KV2V - PN40 2-way regulation ball valves, female threaded hydraulic connections.
• KVMM - Actuator for ball regulation valves with modulating control 0/10 Vdc 24 Vac power supply.
• KV0M - Actuator for 230V On/Off valves.
• KDMA-S - Actuator for modulating damper 0-10V 24V with spring return.
• KDMA - Actuator for modulating damper 0-10V 24V without spring return.
• KDOA - Actuator for ON/OFF damper with spring return.
All the probes, actuators and valves on the Full Control section are also available.